I have the:
1.
Malkoff: obviously has the best quality
2.
Kaidomain Q5: quality not as good as Malkoff, but way brighter than the Terralux, plus heatsinking is good. Cheaper than Terralux. For an extra $17, you get an
UCL and OP aluminum reflector. Pretty good deal.
3. Terralux: Horrible heatsinking, definitely not as bright as the above two. Really wouldn't recommend it unless you had the above 2 already and had money to burn.
PS - If anyones the terralux for the 2-3D, PM me, I have one for sale